Decouple TabLoader from SessionRestore.

chrome/browser/sessions/session_restore_delegate.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_SESSIONS_SESSION_RESTORE_DELEGATE_H_
+#define CHROME_BROWSER_SESSIONS_SESSION_RESTORE_DELEGATE_H_
+
+#include <vector>
+
+#include "base/time/time.h"
+
+namespace content {
+class WebContents;
+}
+
+// SessionRestoreDelegate is responsible for creating the tab loader and the
+// stats tracker.
+class SessionRestoreDelegate {
+ public:
+  struct RestoredTab {
+    content::WebContents* contents;
+    bool is_active;
+  };
+
+  static void RestoreTabs(const std::vector<RestoredTab>& tabs,
+                          const base::TimeTicks& restore_started);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(SessionRestoreDelegate);
+};
+
+#endif  // CHROME_BROWSER_SESSIONS_SESSION_RESTORE_DELEGATE_H_